This document discusses lessons learned from implementing responsive web design (RWD) for various nonprofit organizations. It provides four key lessons: 1) Assess website designs and objectives through annual post-season reviews; 2) Engage audiences by building for their attention spans, simplifying calls-to-action, and facilitating sharing; 3) Focus on creating and optimizing content; 4) "Open your (web) horizons" by prioritizing mobile access, using techniques like media queries and fluid designs, and testing across environments. Case studies are presented on how the American Diabetes Association, National Kidney Foundation, World Wildlife Fund, and Be The Match applied these lessons in their RWD implementations.
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